From £86,968
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £86,808
BOWIE CONSTRUCTION LTD is a trusted extension builder serving customers in CB10 and the surrounding area. Contact us to today to get a competitive ...
From £87,136
O G Conversions is an established and experienced local extension builder in CB10. Please contact us for a free, no obligation quote and competitiv...
From £87,080
Essex Roofing Ltd is an established and experienced local extension builder in CB10. Please contact us for a free, no obligation quote and competit...
From £88,360
Experienced extension builder ready to quote for your work. ALLIED BUILDING ASSOCIATES LTD is the best extension builder in CB10. No obligation fre...
From £87,216
Trusted and professional extension builder in CB10. Experienced in all extension buildering work and keeping within budget and on quote. DEBRAY BUI...
From £87,208
Trusted and professional extension builder in CB10. Experienced in all extension buildering work and keeping within budget and on quote. 1st Look R...
From £87,456
MDH Construction is an established and experienced local extension builder in CB10. Please contact us for a free, no obligation quote and competiti...
From £87,344
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,104
Relax... you have found a reliable extension builder in CB10. Pinnacle Construction is a friendly and reliable company based in CB10 who consider n...

Building a granny annexe ranges from £86,808 (BOWIE CONSTRUCTION LTD based in CB21) to £88,360 (ALLIED BUILDING ASSOCIATES LTD based in CB22), but these are just estimates that can help give you an idea of who will be better value in your area.
The best thing to do is to get quotes to build a granny annexe in CB10 by posting a job with HaMuch. We will send it to extension builders in CB10 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Haverhill | £37 | £260 |
| Granny Annexe near Bishop's Stortford | £42 | £264 |
| Granny Annexe near South Cambridgeshire | £43 | £305 |
| Granny Annexe near Cambridge | £38 | £271 |
| Granny Annexe near Braintree | £37 | £247 |
| Granny Annexe near East Hertfordshire | £44 | £289 |
| Granny Annexe near Harlow | £43 | £288 |
| Granny Annexe near Ware | £47 | £296 |
| Granny Annexe near Sudbury | £34 | £229 |
| Granny Annexe near Letchworth | £44 | £283 |
Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.

Underpin a building - £17,768

Two storey extension - £88,402

Build a timber frame extension - £26,268

Build a swimming pool - £81,268

Single storey extension - £60,360

Side return extension - £44,515

Install an RSJ - £2,468

Outbuilding - £10,268

Build a Mansard loft conversion - £52,268

Loft conversion - £36,263

Build a kitchen extension - £42,268

Hip to gable loft conversion - £42,268

Granny annexe - £87,268

Garden office - £10,268

Convert a Garage - £16,268

Garage - £18,768

Build a flat roof extension - £22,268

Build a dormer loft conversion - £42,268

Concrete foundations - £6,518

Convert a bungalow loft - £29,268

Convert a basement - £40,515